Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's ...

AN INTERSTELLAR space rock zooming through our solar system may be the oldest comet ever seen by humans, according to ...

I/ATLAS might be over 7 billion years old, a new study reports, which would make it the oldest comet known. But experts caution we need more data.

The solar system has an uninvited guest that is currently shooting toward us on a one-way trip through our cosmic ...

For only the third time in recorded history, an interstellar object has crossed into our solar system, creating quite the ...

In its closest-ever dive into the Sun’s atmosphere, NASA’s Parker Solar Probe has returned stunning new images and data that ...

What at first seemed a routine detection of an object travelling through the solar system soon turned out to be anything but.

Officially named 3I/ATLAS, the comet was confirmed as having originated outside of Earth's solar system on July 3, according ...

Rocky bodies called protoplanets were thought to have formed slightly earlier in the inner solar system than those beyond the ...

A fascinating glimpse into how a solar system like our own is born has been revealed with the detection of planet-forming ...